[Triumf-seminars] TRIUMF Accelerator Seminar today at 12:00

[TRIUMF Seminars]

Date/Time: Wed 2021-03-24 at 12:00

Location:  Remote              

Speaker:   Arshiya A. Ahmed (Marian Smoluchowski Institute of Physics, Jagiellonian University, Cracow, Poland)

Title:     Study of proton and photon induced reactions on natMo

Abstract: Around 2011 a sudden shutdown of two reactors used for the production of medical radioisotopes made the nuclear community look for alternative ways of radionuclides production to meet the requirement. 99mTc is a very important medical radionuclide since it is involved/exploited in almost 80% of diagnostic techniques in nuclear medicine. As an alternative to reactor-based 99Mo/99mTc generator technology, many research groups have suggested the direct production of 99mTc through accelerators.
In this presentation, I will discuss our experimental work on the production of 99Mo (T1/2 = 65.94 h) which is the generator parent of a medically important radionuclide 99mTc (T1/2 = 6 h) through proton and photon-induced reactions on a natMo target. Such production is much more cost-effective compared with a production on an enriched 100Mo target. It may increase the amount of impurities produced, though. Therefore it is of vital importance to quantify the effect.
At 9-26 MeV energy range for proton-induced production on natMo there is a large discrepancy in the cross-section data available for the production of radioactive impurities, hence this work was conducted to contribute data in this range helping to resolve the discrepancy. Using a proton beam from the AIC-144 cyclotron in Cyclotron Centre Bronowice, Cracow, Poland, we studied target yield and the crosssection for the production of long-lived radionuclides produced in the natMo target at the energy range 19-26 MeV. Target yield was derived using the measured activity of produced radionuclides. The total production cross sections for all produced long-lived radioisotopes are presented and compared with the previously available data, showing good agreement. Preliminary results of second irradiation using proton beam of energy 2-17 MeV will be discussed.
Production of 99Mo/99mTc via photonuclear reactions was another of our research topics. The data on photonuclear production are very scarce and that was the motivation for this part of our research We exploited here bremsstrahlung radiation of 60, 100 and 200 MeV electron beam accelerated in the linac of the SOLARIS Synchrotron facility in Cracow, Poland and extracted onto a tungsten plate. The activity of long-lived radionuclides produced from natMo(γ, x) reactions were analyzed , just like in case of proton-induced reactions.

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Meeting ID: 621 4115 4635
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